2. Which of the following is not a character of a sensor of a sound wave?
a) Causes no health hazard
b) They are suitable in a harsh environment
c) They are only suitable in cold environment
d) They can be used in corrosive environmentView Answer

Answer: c
Explanation: Sound sensors can be used in any environment.

3. Sound waves are similar to light waves in all aspects.
a) True
b) FalseView Answer